docs: def get_records_with_attachments(attachment_table, rel_object_field="REL_OBJECTID"):
      """returns a list of ObjectIDs for rows in the attachment table"""
      if arcpyFound == False:
          raise Exception("ArcPy is required to use this function")
      OIDs = []
      with arcpy.da.SearchCursor(attachment_table,
                                 [rel_object_field]) as rows:
          for row in rows:
              if not str(row[0]) in OIDs:
                  OIDs.append("%s" % str(row[0]))
              del row
      del rows
      return OIDs